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Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/solar.py b/src/solar.py
index 041d427..24370c1 100644
--- a/src/solar.py
+++ b/src/solar.py
@@ -98,6 +98,7 @@ def julian_day_to_epoch(t):
     '''
     return (t - 2440587.5) * 86400.0
 
+
 def epoch_to_julian_day(t):
     '''
     Converts a POSIX time timestamp to a Julian Day timestamp
@@ -107,6 +108,7 @@ def epoch_to_julian_day(t):
     '''
     return t / 86400.0 + 2440587.5
 
+
 def julian_day_to_julian_centuries(t):
     '''
     Converts a Julian Day timestamp to a Julian Centuries timestamp
@@ -116,6 +118,7 @@ def julian_day_to_julian_centuries(t):
     '''
     return (t - 2451545.0) / 36525.0
 
+
 def julian_centuries_to_julian_day(t):
     '''
     Converts a Julian Centuries timestamp to a Julian Day timestamp
@@ -125,6 +128,7 @@ def julian_centuries_to_julian_day(t):
     '''
     return t * 36525.0 + 2451545.0
 
+
 def epoch_to_julian_centuries(t):
     '''
     Converts a POSIX time timestamp to a Julian Centuries timestamp
@@ -134,6 +138,7 @@ def epoch_to_julian_centuries(t):
     '''
     return julian_day_to_julian_centuries(epoch_to_julian_day(t))
 
+
 def julian_centuries_to_epoch(t):
     '''
     Converts a Julian Centuries timestamp to a POSIX time timestamp
@@ -143,6 +148,7 @@ def julian_centuries_to_epoch(t):
     '''
     return julian_day_to_epoch(julian_centuries_to_julian_day(t))
 
+
 def epoch():
     '''
     Get current POSIX time
@@ -151,6 +157,7 @@ def epoch():
     '''
     return time.time()
 
+
 def julian_day():
     '''
     Get current Julian Day time
@@ -159,6 +166,7 @@ def julian_day():
     '''
     return epoch_to_julian_day(epoch())
 
+
 def julian_centuries():
     '''
     Get current Julian Centuries time (100 Julian days since J2000)
@@ -167,6 +175,7 @@ def julian_centuries():
     '''
     return epoch_to_julian_centuries(epoch())
 
+
 def radians(deg):
     '''
     Convert an angle from degrees to radians
@@ -176,6 +185,7 @@ def radians(deg):
     '''
     return deg * math.pi / 180
 
+
 def degrees(rad):
     '''
     Convert an angle from radians to degrees
@@ -185,6 +195,7 @@ def degrees(rad):
     '''
     return rad * 180 / math.pi
 
+
 def sun_geometric_mean_longitude(t):
     '''
     Calculates the Sun's geometric mean longitude
@@ -194,6 +205,7 @@ def sun_geometric_mean_longitude(t):
     '''
     return radians((0.0003032 * t ** 2 + 36000.76983 * t + 280.46646) % 360)
 
+
 def sun_geometric_mean_anomaly(t):
     '''
     Calculates the Sun's geometric mean anomaly
@@ -203,6 +215,7 @@ def sun_geometric_mean_anomaly(t):
     '''
     return radians(-0.0001537 * t ** 2 + 35999.05029 * t + 357.52911)
 
+
 def earth_orbit_eccentricity(t):
     '''
     Calculates the Earth's orbit eccentricity
@@ -212,6 +225,7 @@ def earth_orbit_eccentricity(t):
     '''
     return -0.0000001267 * t ** 2 - 0.000042037 * t + 0.016708634
 
+
 def sun_equation_of_centre(t):
     '''
     Calculates the Sun's equation of the centre, the difference between
@@ -226,6 +240,7 @@ def sun_equation_of_centre(t):
     rc += math.sin(3 * a) * 0.000289
     return radians(rc)
 
+
 def sun_real_longitude(t):
     '''
     Calculates the Sun's real longitudinal position
@@ -236,6 +251,7 @@ def sun_real_longitude(t):
     rc = sun_geometric_mean_longitude(t)
     return rc + sun_equation_of_centre(t)
 
+
 def sun_apparent_longitude(t):
     '''
     Calculates the Sun's apparent longitudinal position
@@ -247,6 +263,7 @@ def sun_apparent_longitude(t):
     rc -= 0.00478 * math.sin(radians(-1934.136 * t + 125.04))
     return radians(rc)
 
+
 def mean_ecliptic_obliquity(t):
     '''
     Calculates the mean ecliptic obliquity of the Sun's apparent motion without variation correction
@@ -259,6 +276,7 @@ def mean_ecliptic_obliquity(t):
     rc = 23 + rc / 60
     return radians(rc)
 
+
 def corrected_mean_ecliptic_obliquity(t):
     '''
     Calculates the mean ecliptic obliquity of the Sun's apparent motion with variation correction
@@ -271,6 +289,7 @@ def corrected_mean_ecliptic_obliquity(t):
     rc += degrees(mean_ecliptic_obliquity(t))
     return radians(rc)
 
+
 def solar_declination(t):
     '''
     Calculates the Sun's declination
@@ -282,6 +301,7 @@ def solar_declination(t):
     rc *= math.sin(sun_apparent_longitude(t))
     return math.asin(rc)
 
+
 def equation_of_time(t):
     '''
     Calculates the equation of time, the discrepancy between apparent and mean solar time
@@ -300,6 +320,7 @@ def equation_of_time(t):
     rc -= 1.25 * e ** 2 * math.sin(2 * m)
     return 4 * degrees(rc)
 
+
 def hour_angle_from_elevation(latitude, declination, elevation):
     '''
     Calculates the solar hour angle from the Sun's elevation
@@ -317,6 +338,7 @@ def hour_angle_from_elevation(latitude, declination, elevation):
     rc = math.acos(rc)
     return -rc if (rc < 0) == (elevation < 0) else rc;
 
+
 def elevation_from_hour_angle(latitude, declination, hour_angle):
     '''
     Calculates the Sun's elevation from the solar hour angle
@@ -331,6 +353,7 @@ def elevation_from_hour_angle(latitude, declination, hour_angle):
     rc += math.sin(radians(latitude)) * math.sin(declination)
     return math.asin(rc)
 
+
 def time_of_solar_noon(t, longitude):
     '''
     Calculates the time of the closest solar noon
@@ -345,6 +368,7 @@ def time_of_solar_noon(t, longitude):
         rc = 720 - 4 * longitude - equation_of_time(rc)
     return rc
 
+
 def time_of_solar_elevation(t, noon, latitude, longitude, elevation):
     '''
     Calculates the time the Sun has a specified apparent elevation at a geographical position
@@ -367,6 +391,7 @@ def time_of_solar_elevation(t, noon, latitude, longitude, elevation):
     rc = 720 - 4 * (longitude + degrees(rc)) - et
     return rc
 
+
 def solar_elevation_from_time(t, latitude, longitude):
     '''
     Calculates the Suns elevation as apparent from a geographical position
@@ -383,6 +408,7 @@ def solar_elevation_from_time(t, latitude, longitude):
     rc = radians(rc / 4 - longitude)
     return elevation_from_hour_angle(latitude, solar_declination(t), rc)
 
+
 def solar_elevation(latitude, longitude, t = None):
     '''
     Calculates the Suns elevation as apparent from a geographical position